43. Conditioning is a way of learning by association, _____, by putting together different ideas.(A)
44. These results show ____ the mice in the treatment group healed more quickly than the controlmice
45. Pets have a relaxing ____. Petting or stroking an animal can improve your mood.(A) effect (B) af
46. The unseasonably cold weather has _____ affected the availability of some fresh produce in local
47. The Eisenhower Foundation will soon _____ its funding of external scientific research intosevera
48. The cat uses its ______ to balance and control the direction.(A) whiskers (B) blink (C) beard (D
49. The culture of animal cells in the laboratory was initially more of an art than a science, restr
50. _______the disease can be transmitted through air is still uncertain.(A) Whoever (B) Which (C) W
51. You must take ____ when walking around, as the village has many rabid dogs.(A) considerations (B
52. Not everyone has the time to go the gym and there is no need to. _________ at home is very easya
53. Proper blood ______ is a fundamental feature of good health.(A) circus (B) circumstance (C) circ
54. The oxygen from the air we _____ is carried through the blood from the lungs to all other partso
55. Today in the developed world, most blood donors are unpaid ______ who donate blood for acommunit
57. Plants usually ______ soil primarily for support and water.(A) rely on (B) grow into (C) come ab
58. The medicine is still in the experimental stage, but if it works, it _____ many people.(A) helps
59. ______ appetite over the course of 24 hours may not indicate a serious concern, but after the 24
60. Because of ambiguous or deceptive labeling of the dog food, the owner _____ will feed aninadequa